1950 MB. Discovered 1950 June 24 by M. Itzigsohn at La Plata.
Named for one of the highest mountains in South America. It has an elevation of 6960 meters and is situated on the Argentina-Chile border. The western slope of the mountain is the headwaters of a river of the same name whose outlet to the Pacific Ocean is at Valparaiso. (M 7156)
Name proposed by F. Pilcher.